Drive socket connector



July 25, 1944.

-w. w. DANIEL DRIVE SOCKET CONNECTOR Filed May 1, 1941 m b b 4 1 m 1.

INVENTOR.

. W LLIAM W.DANIEL. )4 C Arm Rug? the high speed rotation of thecarrier.

Patented July 25, 1944 DRIVE SOCKET CONNECTOR William W. Daniel,Kenosha, Wis., assignorto I Snap-On Tools Corporation, Kenosha, Wis.

Application May 1, 1941, Serial No. 391,286

3 Claims.

- This invention relates to drive socket con-' nectors and moreparticularly to drive connectors for valve seat grinder stone carriers,although it may be employed with equal advantage for other purposes. rIt contemplates more especially the provision of a driving socket forvalve grinding stone carrier assemblies or nut turning sockets so thatthe driver may be elevated or lowered with the driven socket connectorwithout any accidental separation therebetween.

In nut turning sockets and valve grinding carrier assemblies there isthe requirement to lift the socket of the carrier from the work withoutinterrupting the continuity of operations. This is especially true ingrinding valves wherein the grinding wheel and its carrier must belifted from the valve seat to maintain the proper speed of rotation andto afford the removal of filings responsive to the centrifugal forceincidental to Without removing the filings the valve seat would becomescored and non-uniform wear would be cccasioned to the grinding stone. v

Consequently in valve grinding operations the driver is continuouslyoperated when the stone is lifted from the valve seat at intervals tofire elude slowing down and also afford cleaning of the filingstherefrom. This lifting of the grinding wheel from the valve seat is aspecifiedirequirement in such operations and is desirable in order toproduce the desired surfacing effect upon the valve seat. It isimportant, therefore, that the driver and the grinding wheel carrier bemaintained in operative connection during the seating and un-seating ofthe grinding stone relative to the valve seat. It is intended,therefore, to provide instrumentalities for preventing the driverknuckle from becoming detached from the driven socket constituting apart of i the grinding stone carrier unless the attendant desires toeffect their separation.

' One object of the present invention is to simplify the constructionand improve the operation of devices of the character described.

Another object is to provide improved means for maintaining the desireddetachable association between the power driver and grinder stonecarrieror other elements involving substantially the same construction andoperating characteristics.

Still another object is to provide improved means for frictionallyconnecting a driver knuckle to a socket to effect rotation in unisonwithout any accidental separation therebetween.

A further object is to provide improved friction engaging means betweenthe driver and a socket complemental thereto so that they will rotate inunison and without any possible accidental separation.

A still further object is to provide improved circumferential yieldingmeans to effect frictional connection between the driver knuckle andstone.

Still a further object is to provide improved engaging means and a stonecomplemental thereto so that one may be lifted with the other or rotatedat relative angles without permitting their accidental separation.

Other objects and advantages will appear from driving stone carrierembodying features of the present invention.

Figure 2 is a fragmentary sectional view in elevation of a valvegrinding stone carrier embodying features of the present invention.-

Figure 3 is a view in elevation of a grinding stone shown inassociation'with the fragmentary valve seat to be newly surfacedtherewith, parts thereof being shown in section to clarify the illustration.

Figure 4 is a top plan view of a valve grinding stone carrier shown inFigure 2.

Figure '5 is a fragmentary sectional-view in elevation of a grinderstone carrier with the driver'knuckle operatively connected therewithand lifted from the valve seat Without causing a separation between thedriver knuckle and its socket.

The structure'selected for illustration is illustrated in connectionwith apower driver M that terminates in a polygonal knuckle ll havingits sides converge to a point l2 so that its largest diameter is removedor spaced therefrom. .The driver knuckle H is adapted to betelescopically received in a correspondingly sized polygonal socket l3broached or otherwise provided in a tubular tool holder cap 14. The toolholder cap I4 is provided proximate the lower end thereof with acylindrical surface l5 of somewhat smaller diameter than the largerexterior portion i6 thereof in order to present a peripheral portion IT.The cylindrical surface l5 with its shoulder ll serves to receive anelongated tubular exterior sleeve l8 that is pressed or otherwisetelescoped thereover for abutment with the peripheral shouland alignedapertures 2 l22 provided in the cap I4 and outer sleev I8,respectivelly, along equidistant radii. This precludes any separationbetween the driving cap I4 and the outer sleeve l8 so that one willrotate responsive to the corresponding rotation of the driver knuckle II that is a complement of the socket I3.

As shown, the outer sleev I8 extends downwardly to terminate in areduced cylindrical tubular boss 23 which is exteriorly threaded as at24 to mesh with corresponding threads 25 provided in a metallic bushing26 comprising the core of a grinding wheel 21.

which serves as a seat or stop for the upper surface 29 of th grindingwheel 21. The cylindrical wall 3| of the outer sleeve I8 is of somewhatsmaller inside diameter than the cylindrical wall I of the tool holdercap I4 to afford a pressfitted connection therebetween in conjunctionwith the threaded studs 20.

A retainer disc 33 in the counterbore I5 presents an upraised axialprojection-34 of comparatively smaller diameter than the inner bore 35of the tool holder cap I4. This provides for ample space within which acoil spring 36 is disposed to envelope the upraised axial retainer discor driver engaging seat projection 34. The coil spring 36 serves tosupport the disc 31 against the peripheral shoulder 38 defined by adriver cap bore 35 which terminates in communication with the somewhatsmaller vertical socket I3 therein. As shown, the spring supporting disc31 has a rounded peripheral exterior edge 39 to permit the tiltingthereof as the spring 3-6 is caused to yield responsive to pressureexerted by the driver knuckle II thereon.

In order to center the driver knuckle II on the spring supporting disc31, the latter is provided with an axial aperture 40 which is somewhatlarger than the tip I2 of the knuckle II for reception therein. Itshould be observed that the axial boss 34 on the retainer disc 33 isinwardly recessed to provide the bore 4| for freely receiving the upperextremity 42 of a pilot stem guide 43. The pilot stem guide 43 may be ofany suitable type and is intended for mounting in the valve stem bore ofan internal combustion engine cylindrical head.

To preclude accidental detachment between the driver knuckle II and theouter socket I3, the latter is provided with an annular groove 46proximate to the upper open edge 41 thereof to receive a split wire ring48. The split wire ring 48 is of somewhat lesser diameter than theannular groove 46 so that the inner circumferential edge thereof willlie within the exterior confines of the socket I3 with sufiicient spacein the annular groove 46 to permit the outward expansion of the ring 41.Consequently, the largest diameter of the driver knuckle II will besomewhat greater than the normal inside diameter of the split wire ring48 to cause the latter to expand responsive to the displacement of thedriver knuckle II therethrough for registry with the socket I3 when thedriver knuckle tip I2 is within the axial aperture 40 of the springsupported disc 31.

In this position the larger diameter of the knuckle II will pass beyondthe split ring 48 which will then contract to its normal diameter overthe driver knuckle I I and preclude its acci dental removal from thesocket I3 and still permitits insertion therein Without any appreciabledifiiculty. This arrangement affords a simple and inexpensive springretainer for the driver The reduced tubular boss' 23 defines an exteriorperipheral shoulder 28* knuckle II when it is in its operative positionof full registry with the outer sleeve holder cap socket I3. Thisenables the power driver III to be lifted with the grinding stonecarrier stone I3 so that the grinding wheel 21 will be removed from itsvalve seat 49 without any possible separation between the knuckle I Iand stone I3 while they are rotating in unison at high speed.

This enables the grinding stone 2'! to be seated and unseated relativeto the valve seat 49 for the desirable maintenance of the speed ofrotation and also to clear the valve seat 49 from all filings that arecreated responsive to the resurfacing and reshaping. The extent ofseparation between the grinding stone 21 and valve seat 49 may be avariable factor depending upon the requirements of each valve grindingoperation, but such must be accomplished without separation ordetachment between the driver knuckle II and the socket I3 in order toreseat the grinding wheel 2'! on the valve seat 49. This seating andunseating operation is continuously effected during valve grindingoperation.

With the arrangement of parts above described, a simple and dependableexpedient has been provided to maintain the driver knuckle II inregistry with the socket I3 against accidental displacement orseparation to insure positive rotation in unison. It should beappreciated that the teachings of the present invention may be employedwith equal advantage for nut turning sockets and handles therefor aswell as many other similar situations.

Various changes may be made in the embodiment of the invention hereindescribed without departing from the invention or sacrificing any of theadvantages or features thereof, and nothing herein shall be construed aslimitations upon the invention, its structural embodiment or concept asto the whole or any part thereof except as defined in the appendedclaims.

I claim:

1. In a device of the character described, the combination with a drivenmember having a polygonal socket, of a spring impelled driver sustainingseat in said socket, a polygonal driver member complemental to saidsocket, and circumferentially expansible means in said polygonal socketto yieldingly retain said driver member against accidental withdrawalfrom said socket, said spring impelled sustaining seat be ing initiallyin an engaging osition therewith.

2. In a device of the character described, the combination with a drivenmember having a. polygonal driver receiving socket, a spring impelleddriver sustaining seat in said socket, and resilient friction means insaid polygonal socket to circumferentially engage a driver therein andprevent accidental removal therefrom, said resilient friction meansbeing partially recessed in the wall of said socket to render suchexpansible therein for permitting the controlled engagement anddisengagement of a driver with said socket.

3. In a device of the character described, the combination with a drivenmember having a. polygonal driver receiving socket, a spring impelleddriver sustaining seat in said socket, and resilient friction meanscircumferentially engageable with said driven member in spaced relationto said spring impelled driver sustaining seat for yieldable retentionof a driver member in said socket for permitting the controlledengagement and disengagement of a driver with said socket.

WILLIAM W. DANIEL.

